Edexcel IGCSE Physics · Spec 7.1
Atomic Structure & Isotopes
The structure of the atom and what isotopes are.
Physics revision video
Atomic Structure & Isotopes
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Spec 7.1
What you need to know
- Describe the structure of an atom
- Use atomic number and mass number
- Explain what an isotope is
Active recall
Quick check
Answer each question before opening the answer.
What are the relative charges of a proton, neutron and electron?
Proton +1, neutron 0, electron −1.
What are isotopes?
Atoms of the same element with the same number of protons but different numbers of neutrons.
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